It’s a fair point — another idea I’m considering is replacing the glossy whiteboard with a matte whiteboard, or possibly putting matte posterboard over the current whiteboard, which could cut down the glare. I tried draping a white cloth behind me, but didn’t like the unevenness/wrinkles and the hassle of setting it up and tearing it down each time. The wall behind the whiteboard is uneven in places, and I like the smooth look that the whiteboard provides. So I’m exploring various combinations of pre/post options to see what might work well.